This is just a suggestion so feel free to ignore it. Usually all forums have the option to allow you to select your GTM, and by doing so adjust the "this message was posted on xx:xx:xx" time tag to give you a better feel of how long the message was posted.

I've noticed CH only uses the default GTM (probably the time where the server is located). A option to allow you to select your GTM and replace time tags based on that option would be cool to see in future site updates.